Pat the salmon fillets dry with paper towels and place them skin-side down (if skin is on) on a piece of parchment paper sized to fit your air fryer basket.
In a small bowl, whisk together the Kewpie mayo, sriracha, and sesame oil until smooth.
Spread about 1 tablespoon of the mayo-sriracha mixture evenly over each salmon fillet. Reserve any remaining sauce for serving.
Season the tops of the fillets with the salt and black pepper.
Place the parchment with the salmon into the air fryer basket and cook at 400°F for 10 to 12 minutes, or until the salmon flakes easily with a fork and reaches your desired doneness.
Remove the salmon from the air fryer and serve immediately, with the reserved sauce spooned over the top if desired.